In March 2025, Tanyan Quan focused on enhancing security processing in the zephyrproject-rtos/openthread repository by delivering a targeted fix in the MAC layer. He refactored conditional compilation logic to distinguish between Full Thread Device (FTD) and Minimal Thread Device (MTD) roles, rather than relying on generic radio presence. This approach ensured that security handling aligned precisely with device roles, reducing the risk of incorrect processing in mixed deployments. Working primarily in C++ and leveraging expertise in embedded systems and network protocols, Tanyan’s work improved the robustness and correctness of security mechanisms across multi-role OpenThread product lines.